| LINFITEX | Model function for fitting line with errors in X and Y
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| MPCHILIM | Compute confidence limits for chi-square statistic
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| MPCHITEST | Compute the probability of a given chi-squared value
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| MPCURVEFIT | Perform Levenberg-Marquardt least-squares fit (replaces CURVEFIT)
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| MPFIT | Perform Levenberg-Marquardt least-squares minimization (MINPACK-1)
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| MPFIT2DFUN | Perform Levenberg-Marquardt least-squares fit to a 2-D IDL function
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| MPFIT2DPEAK | Fit a gaussian, lorentzian or Moffat model to data
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| MPFITELLIPSE | Approximate fit to points forming an ellipse
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| MPFITEXPR | Perform Levenberg-Marquardt least-squares fit to arbitrary expression
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| MPFITFUN | Perform Levenberg-Marquardt least-squares fit to IDL function
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| MPFITPEAK | Fit a gaussian, lorentzian or Moffat model to data
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| MPFTEST | Compute the probability of a given F value
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| MPNORMLIM | Compute confidence limits for normally distributed variable
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| MPNORMTEST | Compute the probability of a given normally distributed Z value
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| MPPROPERR | Propagate fitted model uncertainties to measured data points
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| TNMIN | Performs function minimization (Truncated-Newton Method)
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